869
ACUS03 KWNS 200753
SWODY3
SPC AC 200752
DAY 3 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0152 AM CST THU FEB 20 2025
VALID 221200Z - 231200Z
..NO SEVERE THUNDERSTORM AREAS FORECAST
..SUMMARY
ISOLATED THUNDERSTORMS ARE POSSIBLE NEAR THE MIDDLE AND UPPER TEXAS
COASTAL VICINITY SATURDAY EVENING INTO EARLY SUNDAY.
..SYNOPSIS
AN UPPER SHORTWAVE TROUGH WILL SHIFT EAST FROM AZ INTO THE SOUTHERN
PLAINS ON SATURDAY. SURFACE HIGH PRESSURE AND A COOL AIRMASS WILL
PERSIST OVER THE SOUTHERN PLAINS AND GULF COAST. HOWEVER, INCREASING
SOUTHWESTERLY MIDLEVEL FLOW AND MIDLEVEL MOISTENING IS EXPECTED AS
THE SHORTWAVE TROUGH EJECTS EASTWARD. WARM ADVECTION ATOP THE COOL
BOUNDARY LAYER AND STEEPENING MIDLEVEL LAPSE RATES WILL RESULT IN
INCREASING PRECIPITATION CHANCES FROM LATE AFTERNOON INTO THE
OVERNIGHT HOURS ACROSS PORTIONS OF THE MIDDLE AND UPPER TX COASTAL
VICINITY. SUFFICIENT ELEVATED INSTABILITY (GENERALLY LESS THAN 400
J/KG MUCAPE) WILL EXIST TO SUPPORT ISOLATED THUNDERSTORMS. SEVERE
THUNDERSTORM POTENTIAL IS NOT EXPECTED.
..LEITMAN.. 02/20/2025
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